Can for processing and other purposes



P. W. FLEISCHEFL CAN FOR PROCESSING AND OTHER PURPOSES.

APPLICAnON FILED FEB- 5,19I6- 1,435,384. Patented Nov. 14, 1922.

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R a q 15 I3 5 I H 31401211 foz Patented Nov. 14, 1922.

UNITED STATES 1,435,384 PATENT OFFICE.

PAUL W. FLEISCHER, OF WEST HOBOKEN, NEW JERSEY, ASSIGNON '10 AMERICANCAN COMPANY, 01 NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

' CAN FOR PROCESSING AND OTHER PURPOSES.

original application filed 'August 27, 1913, Serial No. 786,849. Dividedand this application filed February 5, 1916. Serial No. 76,3443.

To all who-m. it may'concem:

Be it known that PAUL W. FLEISOHER, a citizen of the United States,residing at 370 WVest St., Vest Hoboken, in the county of Hudson andState of New Jersey, has invented certain new and useful Improvements inCans for Processing and Other Purposes, of which the following is aspecification.

This invention relates to an improved form of can or container, forcarrying out the improved method of packing food products Which is setforth in my application therefor, Serial #786,849, filed August 27,1913, and the present application is a division of the said formerapplication, in which the can is also set forth.

The present improvement has for its objects to facilitate the rapid andaccurate partial closure of the can so as to leave escape vents betweenthe cover and body of the can, the cover, however, being permanentlylocked in position ready for the final double seaming and hermeticclosing operation.

lVith such objects in View, as well as other advantages which may beincident to the use of the improvements, the invention consists in theparts and combinations thereof hereinafter setforth and claimed, withthe understanding that the several necessary ele ments constituting thesame may be varied in proportions and arrangement without departing fromthe nature of the invention.

In order to make the invention more clearly understood there is shown inthe ac-. companying drawings means for carrying the same into practicaleffect, without limiting the improvements, in their useful applications,to the particular constructions which, for the purpose of explanation,have been made the subject of illustration.

In the said drawings Fig. 1 is a sectional view can and its cover.

Fig. 2 is a sectional View of the filled can with its cover applied andshown in the act of being provisionally secured by the downward pressureof a suitable instrumentality.

Fig. 3 shows the completion of the act of the step started in Fig. 2. a

Fig. 4 showsthe filled can with its cover provisionally secured theretoas in Fig. 3 as when passed into the sterilizing chamber.

Fig. 5 shows the filled can after the same of the empty has beensterilized and the seam between the cover and can body completed bydoubleseaming rolls.

Fig. 6 is a vertical sectional view on an exaggerated scale, designed toshow the formation of the can flange in its relation to the ring liner,and the cover, the parts being in the position which they assume justbefore the preliminary orpartial closing operation is begun.

In the use of the modern sanitary can it has been customary totemporarily secure the flanged, curled and packing-charged cover to theflanged filled can by snap-ping the cover upon the can, or by passingthe can and cover through the first operation of forming the doubleseam, or by pinching the cover and can flange together at several pointsin its circumference, the purpose being always to secure the cover tothecan in such manner as to permit the escape of the expanded vapors andgases from the can during the sterilizing heat or processing operation,while at the same time the solid contents of the can are kept fromexuding or escaping. The present invention, relating as it does to thisparticular feature of packing of food products, contemplates thesecuring of the cover to the can without snapping, Without preliminaryroller operation, and without pinching the preliminary seam but bya'simple downward pressure upon the cover so exerted as to bend outwardand expand in diameter the can flange and thus causesaid flange tointerlock with the incurled edge of the cover. The special advantage ofthis method lies in the circumstance that it may be applied withoutchange to the ordinary sanitary can and its cover as now largely made,and further in the circumstance that this manner of assembling togetherand uniting the filled can and its cover is one that lends itself torapid operation and to the employment of automatic machinery, and to thefurther circumstance that when the filled can and its cover are thusunited, and after passing through the sterilizing process, theprovisional union between the can and cover is left in such form thatthe ordinary double-seaming rolls for finally closing and sealing thejoint can operate perfectly in the ordinary manner. In the said drawing,A represents an ordinary sanitary can having the flamm n.

adapted to be made of greater diameter at its edge by bringing it morenearly into horizontal alinement with the top of the can body. 13represents the ordinary samtary can cover having the flange b andmcurled peripheral projecting fold b which, as 15 well known, is placedupon the outer edge of the can cover to guard the packing material, withwhich this part of the cover is coated, said packing material consistingusually of some flexible adhesive coating and which may be of manykinds. The edge-to-edge or interior diameter of the said incurled flangeb is not less and may be a little greater than the edge to edge diameterof the body flange a before the latter has been pressed down. Thepreserved food contained in the can is represented at C. D represents asuitable instrument for pressing-the cover upon the can.

The operation is as follows: First, the can A is supplied with thecontents C to be preserved; second, the cover B is placed loosely uponthe can with the flange a of the can resting upon the flange 7); third,in this condition the cover is pressed smartly down upon the can flange,causing the latter to bend from its inclined position toward thehorizontal and thus to expand outwardly into the condition shown in Fig.3 and Fig. 4 of the drawing, or sufliciently so that the can and coverare locked together in such manner that the vapor contents and gasesexpanding may find their way out through the joint but the solidcontents will be retained; fourth, the filled can and its provisionallylocked cover are subjected to the sterilizing or processing heat; fifth,finally the filled can fully sterilized and its provisionally lockedcover are sealed together by forming the provisional seam into thehermetic final seam illustrated in Fig. 5, by the application of theordinary double-seaming :rolls or operation.

It sometimes happens that the packing material is not sufliciently setto resist the scraping action of the flange 0 upon the under surface ofthe cover flange b. In such case the scraping action can be quiteovercome by slightly rounding or curling the upper edge of theoutstanding can body flange a, as shown at a. The curvature need be soslight in actual practice that in its least form it could hardly beindicated in the drawing.- The shape and mode of operaamet tion of therounded edge a is shown on an enlarged scale in Fig. 6, in which figurethe packing material is indicated at d. A paper ring liner is a knownform, of such packing, and the said rounded shape of the body flangewill prevent such a paper liner from being abraded, torn or crumpled outof and subsequent hermetic'sealing, comprising a body and a coveradapted to be first loosely secured to the body after the can is filledand to be thereafter hermetically double seamed to the body, said bodyhaving its edge formed with an upwardly and outwardly extending flangewhich becomes of greater diameter when it is flattened down, and saidcover having a vertical shoulder to enter within and engage the verticalwall of the body and a flat flange extending outwardly from saidshoulder and terminating in a downwardly and inwardly extending curlededge of an internal diameter greater than the external diameter of thesaid body flange before it is flattened down, and having a packing onthe under side of said flat flange, whereby the cover may be secured tothe body by downward pressure without producing a hermetic seal.

2. A sheet metal container for processing and subsequent hermeticsealing, the open, end of the body of which is formed with an upwardlyand outwardly extending flange, combined with a cover having a flangeadapted to be pressed down upon the said flange of the body, and havingat its edge a downwardly and inwardly bent curl arranged to pass theedge of the body flange with which curl the edge of the said body flangeinterlocks loosely when the cover is pressed against the body flange,the bodyengaging side-of the cover flange having applied thereto apacking of relatively soft and hermetic-sealing material, and the bodyflange having a rounded edge for engaging,

said packing.

In testimony whereof ll afix m si nature.

PAUL W. FLE SC ER.

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